Select and execute a block of code in the Sources Panel

You can use the shortcut Ctrl + Shift + E to run a block of highlighted code in the Sources Panel. In the clip, I am paused at a breakpoint, and want to access a bunch of variables attached to the this keyword. I select the block where they're defined and change:

this.foo = 'hello'
this.bar = 'world'

Into

foo = 'hello'
bar = 'world'

Finally, I execute that changed block of code so I have foo and bar in scope and can use them while debugging.